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2013年9月22日星期日

Treating my dogs urinary tract infection

A significant number of pet parents at one time or another have to deal with their cat or dog experiencing a Urinary Tract Infection. Frequently the infection is also accompanied by the incidence of struvite stones. So common is this disease that up to 1 in 5 dogs or cats can be affected by this in their lifetime.1


The most common signs of a UTI in cats and dogs is straining during urination, blood in the urine, fever, lethargy, unpleasant smell to urine, incontinence and urinating in inappropriate places, particularly for cats. Among the bacteria responsible for UTIs, E. coli was found to be present in most of the cases followed by Stapylococcus spp., Streptococcus spp., Klebsiella spp. , Proteus spp. and then Pseudomonas spp.


Usually UTIs clear up after antibiotic therapy, but sometimes they recur, either due to reinfection with the same or another bacterial species. The appropriate antibiotic to be used is identified via a urine culture. Modern medicine is, however, plagued by a rising incidence of antibacterial resistance and comes with additional costs, such as adverse effects on gut microflora increasing the risk of infection with Clostridium difficile and this in turn may lead to serious colon infections in dogs. The use of a natural plant based preventative for UTIs and struvite stones would clearly help to reduce the risk of antibacterial resistance and disturbances in gut microflora.


Most struvite stones in dogs are actually infection-induced and female dogs are at the greatest risk for this. The reason for this is likely due to the anatomy of the female urethra, which is short and wide compared with that of the male. When a UTI is caused by Staphylococcus spp. (less commonly Proteus spp. And Ureaplasma) bacteria, a biochemical reaction is put into play which favors the formation of struvite stones in the pets urine/bladder even if the pet is on an acidifying diet.


Dogs typically develop struvite stones (uroliths) in their lower urinary tracts within 2 weeks of contracting a staphylococcal urinary tract infection. There are, however, other conditions that promote crystallization of magnesium ammonium phosphate (i.e. struvite) including an alkaline urine, diet and genetic predisposition. Breeds especially affected by struvite stones include the Miniature Schnauzer, Bichon Frise, Shih Tzu, Lhasa Apso, and Yorkshire Terrier.  Even factors associated with inbreeding have been reported to increase the frequency of struvite uroliths in Beagles. An increased risk of struvite stones in both sexes of Cocker Spaniels, Springer Spaniels and Labrador Retrievers has also been observed. Specific diets high in fat and salt that are given to dogs to help dissolve struvite stones have their own risks. Pathogenic bacteria trapped within the stones are then constantly released and pose a threat for reinfection and a diet high in fat and salt has its own set of health risks.  Surgical removal is another option for stone removal. Sometimes stones can become bigger than half a kilo (1 lb).


One of the most effective natural remedies for Urinary tract infections and by association, infection induced struvite stones is cranberries. Cranberries contain tannins called (pro)anthocyanidins or PACs, which are stable plant compounds exhibiting potent in vitro anti-adhesion activity against pathogenic urinary tract bacteria such as both antibiotic-sensitive and -resistant strains of Escherichia coli. While preventing bacteria from sticking to the cell lining of the urinary tract is believed to be the primary mechanism, a direct mild antimicrobial activity against other UTI causing bacteria has also been reported. Pure cranberry extract powders are the most effective way to get the multiple health benefits of cranberries into your pet. Not only is the extract effective for preventing urinary tract infections and by implication infection induced struvite stones, but the phytochemicals in the berries are heart healthy and also good for dental health. Administering cranberry extract in powder form eliminates the excessive sugar found in juices and dried cranberries, as well the powder mixed in food coats the teeth and helps to keep the your pets mouth clean in exactly the same way it keeps their urinary tract “clean”. The powder is also much more palatable to your pet than fresh cranberries and delivers a much more concentrated dose of the needed phytochemicals. Look for a cranberry extract that is not adulterated with fillers, preservatives or colorants and one that is food grade and certified organic.


References consulted:
1. Urinary tract infection – a European perspective. B. Gerber,  EJCAP – Vol. 17 – Issue 1 April 2007, 51-54.
2. Canine urolithiasis: A look at over 16 000 urolith submissions to the Canadian Veterinary Urolith Centre from February 1998 to April 2003 Doreen M. Houston, Andrew E.P. Moore, Michael G. Favrin, Brent Hoff. Can Vet J Volume 45, March 2004,  225-230.


3. Recurrent urinary tract infections in older people: the role of cranberry products
DEEPA SUMUKADAS1,∗, PETER DAVEY2, MARION E. T. MCMURDO1
Age and Ageing 2009; 38: 255–257 C _ The Author 2009. Published by Oxford University Press on behalf of the British Geriatrics Society.
All rights doi: 10.1093/ageing/afp034 reserved. For Permissions, please email: journals.permissions@oxfordjournals.org
4. Berries: emerging impact on cardiovascular health. Basu, Rhone, Lyons. Nutr Rev. 2010 March ; 68(3): 168–177. doi:10.1111/j.1753-4887.2010.00273.x.
5. Potential oral health benefits of cranberry.
Bodet C, Grenier D, Chandad F, Ofek I, Steinberg D, Weiss EI. . Crit Rev Food Sci Nutr. 2008 Aug;48(7):672-80.


2013年9月14日星期六

Should I use chemotherapy on my dog with transitional cell carcinoma (TCC) of the urinary bladder?

Posted on by tccdoctorcerf



     This is a very good question and I will confess that as little as a few years ago I  was not a big fan of chemotherapy in dogs.  Likewise, though I discussed this option with families faced with having to treat TCC in their dogs, many would not consider the chemotherapy either because of personal experiences with chemotherapy or because their pets were doing so well following our Ultrasound Guided Endoscopic Laser Ablation (UGELAB) procedure that they did not feel any need to pursue chemotherapy.   Since the prognosis for a patient with TCC was so poor, in the beginning  of our developement of the UGEALB procedure,  we were happy to “knock the tumor for a loop” using the laser and to buy a little extra time without “heavy-duty” medicines.  Traditional surgery provides a median survival time of about 80-129 days for TCC patients.  UGELAB was providing a median survival time of approximately 380 days even when faced with obstructive tumors in the urethra that were considered inoperable before UGELAB.  We were delighted with these results and with repeated laser treatments some dogs were now living years instead of months. 


      Then  ”the hammer fell”.   Dogs that had lived much longer than expected as a result of our laser procedure where now  dying not because of the  obstructive nature of transitional cell carcinoma but rather because we had kept them alive long enough to die of metastasis and/or extension into the body cavity around the bladder.    It became obvious that the only way to overcome this frustration was to consider chemotherapy.  Statistically, the longest median survival  time  studied was a combination of mitoxantrone and piroxicam.   Still considering quality of life for  my patients as a primary concern, I consulted with several board certified veterinary oncologists to learn about their experiences with this combination of drugs and what we might expect for our TCC patients.  Surprisingly, the oncologists I spoke with had all had good experiences in administering these drugs in combination without significant side effects.   We had already been using piroxicam for years with minimal side effects, most of which could be handled by adjusting doses or providing protective stomach preparations along with the piroxicam.   Faced with the certainty that our wonderful successes with endoscopic diode laser surgery would eventually be terminated by the development of metastasis,  it seems like a “no brainer”  to give the mitoxantrone and see how we made out.  We had nothing to lose and everything to gain. 


     The first few patients we treated with mitoxantrone could not have gone smoother.   The side effects were minimal and certainly justified considering that we were fighting a cancer that will eventually kill.    Two of our TCC  patients “parents”   reported that their furry kids actually  felt better for a few days after the chemo than they had felt before the treatment.   Difficult to explain,  but no complaints here.  I do not mean to imply that this chemotherapy regimen will not have any side effects.  Some dogs are a little quite for a few days or have a poor appetite.  One of our patients has continued to have a poor appetite long-term and he ( Charlie) insists on having his Mom cook for him but to me, if due to the chemo, this is a small price to pay for a longer and happy life.  Almost all dogs  will develop a very low white blood cell count at 10-14 days and this most be monitored so that the treatment can be adjusted as needed.  We have had no “horror stories” in this regard and every dog has had their blood counts return to normal.  While I am a VERY positive person and attack TCC with a “will win” attitude  we need to recognize that serious side effects are possible  including death.  Faced with the certainty of dying from TCC  my personal belief, given our experiences,  is that proceeding with chemotherapy after  palliative laser therapy (UGELAB) is simply the right thing to do in most cases.


   During initial consultations with clients trying to learn more about treating transitional cell carcinoma in dogs using diode laser through a cystoscope,  I always try to emphasize point out that I am a very positive person, unwilling to simply “roll over” for this bladder cancer.  We have had some wonderful results and a few heart aches, but overall we have met with what I consider to be tremendous successes.  Recognizing that my positive attitude might influence my perception  of what it is like to undergo the UGELAB treatment, I also feel it is important to understand the process from the perspective of the moms and dads and furry kids who have experienced the UGELAB procedure and , in some cases, the mitoxantrone/piroxicam treatment.  This TCC BLOG is a wonderful venue for an appropriate exchange of experiences at Ridgewood Veterinary Hospital.  I encourage those families to contribute to this blog and to help me create a realistic environment wherein others facing this deadly canine bladder cancer can decide on a treatment plan best suited to them and their pets.   Please join our conversation so we can all help,  when appropriate,   to create a longer, healthier, happy life  for these wonderful furry family members.   If you have  joined us in the battle against TCC at Ridgewood Veterinary Hospital please share your story with us.  If you elected to treat with mitoxantrone, what was this like for you and your dog?   If you are struggling to decide on an appropriate treatment for you dog, please post your questions.  Want to stay in touch with the conversation as it progresses?   Sign up for an RSS subscription at www. RidgewoodVet.com under the TCC BLOG link.      


     Let’s help each other  learn more about how to “just do the right thing” for our kids!!!


 Dean J. Cerf, D.V.M.